/in/foo.cc: In function 'int main()':
/in/foo.cc:12:24: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[1001]' [-Wformat=]
     while(scanf("%s",&a)!=EOF)
                        ^
/in/foo.cc:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(i=1;i<strlen(a)-1;i++)
                 ~^~~~~~~~~~~~
/in/foo.cc:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(i=0;i<strlen(a);i++)
                 ~^~~~~~~~~~